Researchers led by Prof. Shen Yuandeng and his scholar Tan Tune from the Yunnan Observatories of the Chinese language Academy of Sciences (CAS) have found new type of oscillation in a single filament pushed by a two-sided-loop jet.
The examine was revealed in Month-to-month Notices of the Royal Astronomical Society.
Filaments are composed of chilly plasma materials suspended within the solar atmosphere and seem as darkish absorbing constructions, whose magnetic info is essential to our understanding of the formation, stability and eruption of filaments.
Of their previous study, Tan Tune et al explored jet-filament interactions by the use of the movement of a two-sided-loop jet within the magnetic rope construction of a filament-coronal cavity.
Within the present examine, they turned their consideration to the large-amplitude filament oscillation triggered by two-sided-loop jet and analyzed the character of this large-amplitude oscillation with the assistance of joint observations from the Photo voltaic Dynamics Observatory (SDO), Photo voltaic Terrestrial Relations Observatory (STEREO) and World Photo voltaic Oscillation Detection Community (GONG).
The researchers studied the oscillations of a big filament on Nov. 29, 2011. They discovered that the two-sided-loop jet generated on the southern foot of the filament first moved northwards alongside the magnetic traces that fashioned the coronal cavity, after which pushed part of the filament materials up and again down earlier than beginning to oscillated longitudinally on the backside of the coronal cavity (magnetic dips).
On the identical time, the northern a part of the filament started to oscillate transversely. The amplitude and interval of the longitudinal (transverse) oscillations have been 12.96 (2.99) Mm and 1.18 (0.33) h, respectively.
The radius of curvature on the base of the magnetic dips was obtained by the seismology methodology to be about 151 Mm, which was in good settlement with the modern three-dimensional reconstruction of the instantly “seen” magnetic depressions (166 Mm).
The magnetic area strengths of the northern and southern elements of the filament have been additionally identified at 23 and 21 Gauss, respectively, which additionally identified the decrease restrict of the jet power.
The researchers instructed that the newly fashioned jets couldn’t solely set off simultaneous longitudinal and lateral oscillations in a single filament, but in addition be used as a seismological instrument to diagnose details about the filaments (e.g., magnetic construction, magnetic area power and magnetic twists).
Extra info:
Tune Tan et al, Stereoscopic statement of simultaneous longitudinal and transverse oscillations in a single filament pushed by two-sided-loop jet, Month-to-month Notices of the Royal Astronomical Society (2023). DOI: 10.1093/mnras/stad295. On arXiv: DOI: 10.48550/arXiv.2301.07989
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Chinese Academy of Sciences
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Scientists uncover new type of oscillations in single filament pushed by two-sided-loop jet (2023, February 22)
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